GRC 211 Lecture Notes - Lecture 5: Polypropylene, Physical Strength, Greaseproof Paper
28 May 2017
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Document Summary
Better ink hold-out, prints have higher quality. Brightness (opaque paper [for both coated and uncoated]) #1 to #5 (1 = highest brightness // 5 = lowest brightness) Label paper - pressure sensitive (self-adhesive) label. Very resistant to tearing, moisture, exposure to uv light, high opacity. Paper and paperboard: 52% // plastics: 16% // glass: 14% // wood: 11% Plastic recycling: #1 and #2 are generally recyclable. #2 plastic vs. #5 plastic: #5 is lighter. Types 1, 2, 4, 6 do not use bpa. Combinations/layers of paper, adhesives films, coatings to combine the best of all properties. Metallized film: polymer films coated with a thin layer of metal (usually aluminum) Can be used as an in-line process, creating packs ready for filling. Made of plant fibers (md and cmd) International standard for defining paper vs. board. >250 = board // <250 = paper. Sbs (solid bleached sulfate) and sus (solid unbleached sulfate)
